Femtosecond Free Induction Decay Beats in Nd^<3+>:YAG Crystal
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概要
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Femtosecond free induction decay (FID) beats were observed for the ^4F_<3/2> - ^4I_<9/2> transition of Nd^<3+> ions doped in Y_3Al_5O_<12> (YAG) crystal at room temperature using a model-locked Ti^<3+>Al_2O_3 laser. This is the first observation of room-temperature dephasing processes in the time domain for rare-earth ion doped materials. The FID beat signal shows a dip structure produced by the interference between the pump pulse and the FID signal, and a quantum beat. The FID signal became large and comparable to the pump pulse as the crystal length was increased. The FID intensity evoluion due to the pulse propagation is explained well by phenomenological equations.
- 社団法人応用物理学会の論文
- 1997-12-01
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